@echo off set "BASE=%~dp0" "%BASE%core\firefox.exe" -no-remote -profile "%BASE%profile" -new-instance This script gives you a fully portable, update‑disabled Firefox 56 ready for legacy extensions.

if not exist "%FIREFOX_EXE%" ( echo ERROR: firefox.exe not found at %FIREFOX_EXE% pause exit /b 1 )

echo Profile dir: %PROFILE_PATH% "%FIREFOX_EXE%" -no-remote -profile "%PROFILE_PATH%" -new-instance

firefox portable 56
firefox portable 56